Standard Test Method for Rockwell and Brinell Hardness of Metallic Materials by Portable Hardness Testers

Importancia y uso:

3.1 Portable hardness testers are used for testing materials that because of their size, location or other requirements such as test point are unable to be tested using traditional fixed instruments.

3.2 Portable hardness testers, by their nature, induce variation that could influence the test results; therefore, hardness measurements made in accordance with this test method are not considered to meet the requirements of E10 or E18. The user should compare the results of the precision and bias studies in E110, E10 and E18 to understand the differences in results expected between portable and fixed instruments.

3.3 Two test parameters that can significantly influence the measurement accuracy when using portable hardness testers are the alignment of the indenter to the test surface and the timing of the test forces. The user is cautioned to do everything possible to keep the centerline of the indenter perpendicular to the test surface and to apply the test forces using the same time cycle as defined in Test Method E10 or Test Methods E18.

3.4 Portable hardness testers are delicate instruments that are subject to damage when they are moved from one test site to another. Therefore, repeating the daily verification process during the testing sequence is recommended to insure that they are working properly.

3.5 Hardness testing at a specific location on a part may not represent the physical characteristics of the whole part or end product.

Subcomité:

E28.06

Referida por:

A0370-24, A1058-19, E0010-23, E0018-24, E0018-24, A0370-24, A1099_A1099M-20, A0672_A0672M-19, A0671_A0671M-20, A0671_A0671M-20, A0672_A0672M-19, E0010-23, E0018-24, E3246-22

Volúmen:

03.01

Número ICS:

77.040.10 (Mechanical testing of metals)

Palabras clave:

Brinell; hardness; portable; Rockwell;